Or to say, behind many camps howling in the night, it is very likely these monsters are at work, but most people have no way to discover them when they are invisible, so the reason is simply attributed to fear.
These high-level Terror Demons are very likely not summoned by humans, but rather generated by the Tukan Army itself.
Highly dense formations and a huge number of soldiers suffering setback after setback, morale being low for a long period, heavy casualties in the Lake Asen ambush, confusion and fear about the future, and so on.
This combination of conditions together forms the best breeding ground for these alien monsters.
The Shadow Assassins merely took the opportunity to amplify their effects to the maximum.
Whether it was opportunistic or deliberate, it remains unknown.
Driven out from their invisibility, the Terror Demons' sticky gray hide swells high, with all mouths wide open, emitting shrill, inhuman wails.
